*The shape characteristics of tank shape top mark buoy.

1) When using the top marker to represent the tank shape characteristics of the buoy, the maximum vertical profile of the top target should be rectangular, the diameter of the tank should be 0.20 to 0.30 of the diameter of the float, the height should be 1.00 to 1.50 times the diameter of the tank, and the height of the support rod should be 0.35 to 0.60 of the diameter of the tank. please check the picture below:

2) When the tank characteristics of the buoy are represented by a lookout plate, the maximum vertical profile of the lookout plate and the bracket should be rectangular, and the overall shape display should be with the tank characteristics. The length of the bottom edge of the lookout plate should not be less than 0.70 of the diameter of the floating body, and the height H should not be less than 0.9 to 1.5 times the length of the bottom edge of the lookout X. Please check the picture below:

3) When using the shape to represent the tank characteristics of the buoy, the maximum vertical profile of the buoy shape should be rectangular, the overall shape display should be with the tank characteristics, and the height should be 0.90 to 1.30 times the diameter of the float. please check the picture below:

* The Spherical shape features.

1) When using the top mark to represent the spherical shape characteristics of the buoy, the maximum vertical profile of the top target should be circular, its diameter should be 0.20 to 0.30 of the float diameter, the height of the support rod should be 0.35 to 0.60 of the diameter of the sphere, and the spacing between the two top targets should be 0.25 to 0.50 of the diameter of the sphere when it is with doule top marks. please check the picture below:

2) When using a lookout plate to represent the spherical feature of a buoy, the maximum vertical profile of the lookout plate and the bracket should be circular, and the overall shape display should be with a spherical feature. The diameter of the lookout plate should not be less than 0.7 of the diameter of the float. please check the picture below:

3) When representing the spherical feature of a buoy in shape, the maximum vertical profile of the buoy shape should be circular, and the overall shape display should hbe with a spherical feature. please check the picture below:

*The shape features of the "X" shape and the cross shape top mark.

 The X-shaped top mark buoy composed of two diagonal lines of the square and the cross top mark composed of the two center lines of the square vertical and horizontal, the square side length X should be 0.25 to 0.30 of the floating body diameter, and the diagonal or center line width is not less than 0.15 of the square side length length. The height of the X-shaped or decatural strut should be 0.35 to 0.60% of X. please check picture below: